FIRST DOWN. All progress in a football game is measured in yards. The offensive team tries to get as much yardage as it can to try and move closer to the opponent's end zone. Each time the offense gets the ball, it has four downs, or chances, in which to gain 10 yards.
The largest eagle species in the world is the Pithecophaga jefferyi or Philippine eagle. This species of eagle is on the critically endangered list due to the rapid decline in habitat, which is the tropical rainforest. Keep Learning.
Animals / Types of Birds / Eagles - Regal Birds of Prey / Harpy Eagle - World's Largest Eagle. At up to 39 inches (100 cm), the harpy eagle is the tallest and some specimens compete to be the largest eagles in the world (The Philippine eagle can have a larger wingspan and Steller's sea eagle can be heavier.). It has gigantic feet that are the size of a male humanâs hands, but with deadly sharp claws.